Spray material



UNITED STATES P'ATENTOFFICE SPRAY MATERIAL John W. Roberts, Washington, D. 0., dedicated to the free use of the Government and the People of the United States No Drawing. Application September 16, 1932,

Serial No. 633,465

1 Claim. (Cl. 167-14) (Granted under the m of March'3, 1883, as amended April so, 192s; 310 o. G. 757) This application is made under the act of approximately equal to those of the lime sul- Mal'ch 1833, a a e d y the act of April Dhur. In addition the combination or mixture 30, 1928, and the invention herein described may is markedly less injurious to plants than is the be manufactured and used by or for the G overnlime sulphur used separately, approximating in 5 ment for governmental purposes without the this respect the noninjurious properties of the payment to me of any royalty thereon. zinc-lime mixture when used separately. The

I hereby dedicate the same to the free use of combination of zinc-lime with lime sulphur may the Government and the Peopleof the United also be mixed with insecticides such as lead ar- States. senate and the mixture applied simultaneously In my patent (No. 1,791,430), a mixture of zinc without injury to the effectiveness of either the 10 sulphate and lime, to which other substances zinc-lime and lime-sulphur mixture or the in- I may be added to increase sticking and spreadsecticide.

ing properties, is described. This fungicide and For example,. zinc-lime may be prepared by bactericide, hereafter designated zinc-lime, is mixing 4 lbs. of zinc sulphate (white vitriol) successfully used for protecting plants from the with 4 lbs. of hydrated lime (calcium hydroxide) 5 attacks of certain parasitic organisms. It may in 50 gallons of water. Then 1%, gallons of lime also be applied to plants as a parasiticide in comsulphur solution testing 33 Baum may be bination with other parasiticides such as lead added. If desired, arsenate of lead at the usual arsenate, nicotine compounds, and mixtures strength may be added for the control of cercontaining elemental sulphur. In such mixtain insect pests. The above-described mixture 20 tures, there being little, if any chemical combiin fluid form when sprayed upon plants causes nation, the parasiticidal properties of the varino injury and is toxic to parisitic organisms. ous components of the mixture remain un- The quantities of the ingredients in the abovechanged and are essentially the same as if the described compounds or mixture of compounds various components were applied separately. may be varied as conditions demand. The in- 25 The advantage tothe user is a saving in time gredients may also be mixed and applied in dry and money by applying for different purposes form, the diluent being hydrated lime (calcium various parasiticides suspended in the same fluid hydroxide) or inert materials such as talc. or mixed together dry and applied as a dust. Furthermore, colloidal materials such as case- As will hereafter be seen, there is a further in, glue. or colloidal clay, may be added for the 3 unique advantage in the mixture of zinc-lime purpose of increasing the adhesive or spreading with other parasiticides. properties of any of these compounds or mix- 'My new invention pertains to improvements tures of compounds thus addingto their effecin and novel uses for the zinc-lime spray as foltiveness as parasiticides when applied to plants lows: in either liquid or dry form. 0'

When combined with the calcium polysul- I claim: phides which, together with other compounds of A parasiticidal preparation, comprising the calcium and sulphur are commonly known as complex products of thereaction between zinclime sulphur, a compound or mixture of comlime. n i p r- 40 pounds is formed possessing'parasiticidal prop- 40 erties superior to those of zinc-lime alone and JOHN W. ROBERTS. 

